package com.hmall.common.intreceptor;

import cn.hutool.core.util.StrUtil;
import com.hmall.common.utils.UserContext;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author zzw
 * @date 2025/6/20
 * @description 用户信息拦截器
 */
public class UserInfoInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object handler) throws Exception {
        // 1.获取请求头中的用户信息
        String userInfo = request.getHeader("user-info");
        // 2.判断是否为空
        if (StrUtil.isNotBlank(userInfo)) {
            // 不为空，保存到ThreadLocal
            UserContext.setUser(Long.valueOf(userInfo));
        }
        // 3.放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
                                Exception ex) throws Exception {
        UserContext.removeUser();
    }
}
